What statement about 802.11 WLAN bridges is true?
What statement about 802.11 WLAN bridges is true?
WLAN bridges must use a channel with acceptable Signal-to-Noise Ratio (SNR) at both transceivers to maintain the desired data rate bi-directionally. An acceptable SNR is essential for ensuring reliable communication and maintaining the data rates required for the bridge's operation. This is a general principle for wireless communication that applies to WLAN bridges.
B is the only one that makes any sense to me.
Option A is wrong because WLAN bridges can operate in both 2.4GHz and 5GHz bands. Option C is wrong because MIMO technology was introduced in the 802.11n standard which supports both 2.4GHz and 5GHz frequency bands. Thus MIMO communications can be supported by WLAN bridges operating in either or both frequency bands. Option D is wrong because in reality a WLAN Bridge communication (and every other 802.11-based communication) can never be totally free from RF interference of one kind or another. Thus Option B is the correct answer.
Then this is a fictional part. Please report that it's using magic going against WiFi Alliance standards.: https://www.apm.com.tw/mimo-300mbps-outdoor-bridge-2-4ghz-ape-2405mm8.html
802.11n indeed uses MIMO, but it could be deployed either at 2.4GHz or 5GHz. I think option B is the only one that fits.